As for Idris Elba’s character, it was also rumored that Hobbs and Shaw’s main antagonist is a mysterious, British international terrorist named “Mr. Null” who dresses in all black.
Unofficially, in addition to Deckard (and Owen) Shaw’s sister playing a role in the spinoff, it’s rumored that Hobbs’ mother and five brothers will be introduced, with “Jonah” Hobbs reportedly playing a big role.
This is definitely a role that Elba could pull off, but until more information comes in, we can’t discount that he might be playing someone else, like a corrupt government figure.
So far no official plot details for Hobbs and Shaw have been disclosed yet, other than the fact that Luke Hobbs and Deckard Shaw will be splitting off from the main Fast and Furious cast to go on their own adventure and build on the chemistry they established in The Fate of the Furious.